physics

Joel Appelbaum

Joel Appelbaum is a physics topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Joel Appelbaum rather than just read about it. In short: Joel Alan Appelbaum (born December 30, 1941) is an American physicist. Appelbaum was born in New York City on December 30, 1941, and successively earned a Bachelor of Science degree from the City University of New York in 1963 followed by a Master of Science and PhD in physics at the University of Chicago in 1964 and 1966, respectively.

Key takeaways

Joel Appelbaum belongs to physics; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect Joel Appelbaum to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Joel Appelbaum from memory before moving on to harder problems.

Reference excerpt

Joel Alan Appelbaum (born December 30, 1941) is an American physicist. Appelbaum was born in New York City on December 30, 1941, and successively earned a Bachelor of Science degree from the City University of New York in 1963 followed by a Master of Science and PhD in physics at the University of Chicago in 1964 and 1966, respectively. He joined Bell Laboratories in 1967, taught for one academic year at the University of California, Berkeley, then returned to Bell, where he remained until 1994. While affiliated with Bell Labs, Appelbaum was elected a fellow of the American Physical Society in 1978 and shared the APS Davisson-Germer Prize in Atomic or Surface Physics with Donald R. Hamann the following year. Between 1994 and 2000, Appelbaum worked for the Micropolis Corporation. He has also worked for Univel.

References

Worked examples

Example 1 — a first encounter with Joel Appelbaum

Start with the simplest possible case. Write down what Joel Appelbaum claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In physics, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Joel Appelbaum before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Joel Appelbaum ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Joel Appelbaum

In research: Joel Appelbaum appears in physics research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses Joel Appelbaum in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: Joel Appelbaum is common in secondary-school and first-year university syllabi. It links to neighbouring topics 1941 births, 20th-century American physicists, City College of New York alumni, so understanding it makes those chapters shorter.
In everyday life: Look for Joel Appelbaum outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study Joel Appelbaum in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Joel Appelbaum means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain Joel Appelbaum out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Joel Appelbaum in simple terms?

Why does Joel Appelbaum matter?

Because it connects several physics ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Joel Appelbaum?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Joel Appelbaum.